Draw a histogram of social data

There are a wide variety of social sites that produce datasets. In this example, we will gather one of the datasets and produce a histogram from the data. The specific dataset is the voting behavior on WIKI from https://snap.stanford.edu/data/wiki-Vote.html. Each data item shows user number N voted for user number X. So, we produce some statistics in a histogram to analyze voting behavior by:

• Gathering all of the voting that took place
• For each vote:
  • Increment a counter that says who voted
  • Increment a counter that says who was voted for
  • Massage the data so we can display it in two histograms

The coding is as follows:

%matplotlib inline
# import all packages being used
import matplotlib.pyplot as plt
import pandas as pd
import numpy as np
import matplotlib

# load voting data drawn from https://snap.stanford.edu/data/wiki-Vote.html
df = pd.read_table('wiki-Vote.txt', sep=r"\s+", index_col=0)

# produce standard summary info to validate
print(df.head())
print(df.describe...